Boolean.prototype
属性表示Boolean
构造函数的原型。
Boolean.prototype 属性的属性特性: |
|
---|---|
writable | false |
enumerable | false |
configurable | false |
描述
Boolean
实例添加属性或方法。
属性
-
Boolean.prototype.constructor
-
返回创建了实例原型的函数。默认为
Boolean
函数。
方法
-
Boolean.prototype.toSource()
-
返回包含
Boolean
对象源码的字符串;你可以使用这个字符串来创建一个等价的对象。覆盖了Object.prototype.toSource()
方法。 -
Boolean.prototype.toString()
-
根据对象的值来返回一个字符串:
"true"
或"false"
。覆盖了Object.prototype.toString()
方法。 -
Boolean.prototype.valueOf()
-
返回
Boolean
对象的原始值。覆盖了Object.prototype.valueOf()
方法。
规范
Specification | Status | Comment |
---|---|---|
ECMAScript 1st Edition (ECMA-262) | Standard | Initial definition. Implemented in JavaScript 1.0. |
ECMAScript 5.1 (ECMA-262) Boolean.prototype |
Standard | |
ECMAScript 2015 (6th Edition, ECMA-262) Boolean.prototype |
Standard | |
ECMAScript Latest Draft (ECMA-262) Boolean.prototype |
Draft |
浏览器兼容
The compatibility table on this page is generated from structured data. If you'd like to contribute to the data, please check out
https://github.com/mdn/browser-compat-data and send us a pull request.
Update compatibility data on GitHub
Desktop | Mobile | Server | |||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|
prototype |
Chrome Full support 1 | Edge Full support 12 | Firefox Full support 1 | IE Full support 3 | Opera Full support Yes | Safari Full support Yes | WebView Android Full support 1 | Chrome Android Full support 18 | Firefox Android Full support 4 | Opera Android Full support Yes | Safari iOS Full support Yes | Samsung Internet Android Full support 1.0 | nodejs Full support Yes |
Legend
- Full support
- Full support